lunchbox /ˈlʌntʃˌbɒks/ noun7 •A container for transporting meals, especially lunch.“If someone assaulted you, if someone offended you, would you keep a memento of their assault? Would you stick it on your daily lunchbox and carry it with you day in and day out?” she asked. — 2025 •A lunch packaged in a disposable box to be taken away to eat.Jack was carrying his lunchbox with him. •(UK, slang) The penis when enclosed in clothing. •(slang) A person seen as weak and disposable who could easily be sacrificed without much guilt or afterthought. •(slang) A luggable; an early laptop computer, usually a unit with a handle and a fold-out keyboard.You'll find a mix among clamshell laptops for strong laps, lunchboxes, and sewing-machine configurations; the latter two designs typically have detachable keyboards. — 1988 •A cocktail made with beer, orange juice, and almond liqueur. •(slang) A simple portable transmitter sometimes used in phreaking. formslunchboxes